Brake-shoe.



N0...- 806,252. y PA'IBNTED DEC. 5, 1905.

HQK. GILBERT.

v BRAKE SHOE. APPLICATION HLBD JAN.' 1e, 1905.

` 2 SHEETS-SHEET 2.

. offriction of saidshoe.

, UNITED sTATns PATENT onnion."

Specification of Letters Patent.

Patented Dec. 5, 1905.

Application led January 16, 1905. Serial No. 241,362.

To all whom it may concern:

Be it known that I, HENRY K. GILBERT, a `citizen of the United States, residing at Chicago, in the county of Cook and State vof Illinois, haveinvented certain new and useful Improvements in Brake-Shoes, of which the fol'- lowing is a specification. A

.This invention refers to a means for strengtheningthe body of a brake-shoe by an integral ,truss-of tough `andductile metal, usually wrought iron or-steel, extending from the rear face of the shoe but connected rigidly with said shoe at vits opposite ends.

. kThe invention .also vrefers to a means for anchoring said truss in said brake-shoe.

The invention further refers to a meansdfor providing insertsof ametalhaving a different ldegree ofl hardness from that of the body of the shoe, which inserts are placed in the wearing-face of the shoe and may serve both to anchory said truss and to increase the coeiicient The invention further refers to means for strengthening the securing-loop `of brakeshoes and to the combination of said strengthening means with the truss hereinbefore mentioned. l

In the accompanying drawings, Figure 1 is "a perspective view illustrating one embodiment ofthe truss of this invention formed for a brake shoe. Fig. 2 illustrates said truss with anchor-blockssecured upon its opposite ends. Fig3 is a side elevation of one form of brake-shoe embodying my invention, partly in section, illustrating the position of the'anchor-blocks inthe body of the shoe and also the position of thetruss. Fig. 4 is a rear face view of said brake-shoe, a portion. of the attaching-loop. being in section. Fig. 5 illustrates a formoll truss, the truss-bars of which have inwardly-extending projections adapted to be embedded Within the top of the securingloop vfor strengthening said loop. Fig. 6 is a side elevation, partly in section, of a shoe provided With the truss shown in the last preceding figure. Fig. 7 is a transverse view through the securing-loop of a brake-shoe, showing a modification of the strengthening means for said securing-loop. Fig. 8 is a ,perspective view of said modified strengthening means separate from the shoe-body.

In the construction of a brake-shoe embodying this invention I provide a truss composed of one or more pieces of metal, preferably wrought iron or 'steel and in ths'instance of p 'Od form.

1 refers to the form of truss shown in Fig. 1. The rod or rods which constitute said-truss l are bent in arch form to provide the trussbars 2 and 3, which truss-bars at their ends have feet portions 4 and inturned connecting-bars 5, as shown in Figs. 2 and 3. Anchor-block 6, formed of -wrought-iron, caststeel. or other suitable metal of different texture and hardness Ifrom the metal of the body of the shoe, may be placed between the feet portions 4 of the truss-bars and the connectying-bars 5 lirmly embedded within said an- Chor-blocks. In practice said bars are so embedded byforging the anchor-blocks hot over said connecting bars or placing 'said bars in the mold in Which said anchor-blocks are cast and pouring molten steel or other metal into said molds. The anchor-blocks 6, the feet 5, and the ends of the truss-bars 2 and 3 are similarly em bedded within the body Y -the truss-bars and, embedding them, as it does,

and thus holding them rigidly, stitfens rthe shoe.

In Fig. 5 I have illustrated another form of truss,(designated as la, )the truss-bars of which are provided With projections l", adapted to be embedded in the upper side of the securing-loop 8 of the brake-shoe, as shown in Fig. 6, to strengthen said loop. The projections mentionedhave been formed in this instance by suitably bending .the rod of which the truss is made and flattening the bent portions.

-loo

A different means for strengthening the sev curing-loop of a brake-shoe is illustrated in Figs. 7 and 8. A rectangular sheet-metal loop 9 of oblong cross-section., .having two ears 10 punched from the material of which the loop is formed and extending outwardly` from each side of the'upper end of said loop,

IIO

and bearing upon the ears 10,.- The .loop 9 binds the parts of the securing-loop 8.b together and anchors it firmly to the shoe-body.

The shoe is secured to the brake-head (not shown) in any suitable manner, as by means of the attaching-loop 8 8'L 8h, theends'ftl` brake-head or portions thereof bearing against shoulders 11formed uponthe rear face of and at opposite ends of the shoe-body 7.-

Great strength is imparted to the body of the shoe by the truss 1, and should said shoe become cracked or broken between its ends the parts of the shoe will be retained in position and will be nearly if not quite as serviceable as a perfect shoe. The anchor-blocks 6 set in the face of the shoe being of softer metal than said shoe increase its braking efliciency by raising its coeflieient of friction.

The embodiment' herein shown of this invention may be modied in various ways without departing from the spirit and scope of the invention, wherefore I desire to have it understood that I do not wish to limit myself to the particular details herein set forth.

I claim as my invention-- l. A brake-shoe having an integral truss formed of a malleable-metal rod bent to form said truss the end portions only of said truss being embedded in said shoe.

2. A brake-shoe having secured thereto a truss comprising two truss-bars, the end por.-

' tions onlyof said bars being embedded in said shoe.

3. A brake-shoe `having an integral truss made of a rod bent to form two truss-bars.

4. A brake-shoeprovided with a securingv loop and an integral truss of malleable metal,

the middle portions of said truss being embeddedwithin said securing-loop, and the end portions only of said truss being yembedded in the brake-shoe.

5. y A brake-shoe provided with a securingloop, also having secured thereto a truss comprising two truss-bars, the middle portions of said truss-bars being embedded in said securing-loop, and the end portions `only of said -bars being embedded in the shoe-body.

jeetions.

. 6. A brake-shoe having a securing-loop integral with said shoe and an integral truss comprising two truss-bars, which truss-bars extend through the sides of said loop, the end portions only of said bars being embedded in the shoe-body.

7. A brake-shoe having an integral truss formed of a malleable-metal rod bent to form said truss, said shoe having anchor-blocks embedded in itfor said truss.

8. Abrake-shoe havinga truss formed of two curved truss-bars, the ends of-said trussbars being bent to form feet portions, which feet portions are secured to anchor-blocks embedded in the body of the shoe.

9. A brake-shoe having an integral truss made of a rod bent to form two truss-bars, the ends of said truss-bars beingembedded in anchor-blocks, which anchor-blocks are elnbedded in the-body of the shoe.

10. A brake-shoe having anintegral truss formed of malleable metal, said shoehaving anchor-blocks embedded in it for said truss, one side of each of said blocks being llush with the face of the shoe.

11. A brake-shoe having an integral truss made of a rod bent to form two truss-bars, said shoe having an integral"securing-loop through the sides of which loop-the truss-bars of said truss extend, saidshoe 'having embedded in its face two anchor-blocks in which the endsof said bars are embedded.

12. A brake-shoe having atruss 'secured to the body of the shoe, said shoe having a securing-loop through which the middle portion of said truss extends, said trussl having a projection -thereon lying within said loop.

13. A brake-shoe having securedy thereto a truss comprising two trussbars, said shoe having a securing-loop 4through which said truss-bars extend, said truss-bars being bent within said loop toprovide strengthening pro- .HENRY K. GILBERT Witnesses:

C. M. CONNELL,

GEORGE L. CHINDAHL. 

